THE EFFECT OF BIOLOGICAL FERTILIZERS ON YIELD AND YIELD COMPONENTS OF MAIZE UNDER DIFFERENT LEVELS OF CHEMICAL FERTILIZERS UNDER NORMAL AND DEFICIT IRRIGATION CONDITIONSShoaei, Sh, Noor-Mohammadi, Gh., Choukan, R.3, H. Heydari Sharifabad , A.Kashani and F.Rafiei
The aim of this study was to evaluate effect of nitroxin, super nitro plus and biophosphorus on yield and yield components of maize (Zea mays) under different levels of chemical fertilizers in the conditions of normal and deficit irrigation. Experiment laid out as split plot factorial based on randomized complete block design with three replicates. Main plots include two irrigation treatments of 70 (I1), 120(I2) mm evaporation from class A pan. Sub plots were biological fertilizer and chemical fertilizer as factorial biological fertilizer consisting of nitroxin (Azospirillum lipoferum Azospirillum brasilens Azotobacter chroococcum Azotobacter agilis (108 CFU mL-1) (B1), super nitro plus (Azospirillum SPP, + Pseudomonas fluorescence + Bacillus subtilis (108 CFU mL-1) + biological fungicide) (B2), biophosphorus (Pseudomonas sp + Bacillus sp (107 CFU mL-1) (B3) and chemical fertilizer consisting of NPK (F1), N5oP5oK5o (F2) and NoPoKo (F3). The results showed that usage of biological fertilizer have positive effects on chemical fertilizers use efficiency and tolerance to drought stress in maize. Also with use of biological fertilizer the use of harmful chemical fertilizers can be reduced.
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